In the matrix multiplication AB = 122
BA is not defined
How to complete the matrix multiplication
Matrix multiplication is possible when, the column of the first is equal to the row of the second
R x C * R' x C' = R x C'
AB is defined and the multiplication is done below
= 5 * 3 + 6 * 4 + 7 * 5 + 8 * 6
= 15 + 24 + 35 + 48
= 122